nroff typo fix (based on a report from horikawa@jp.FreeBSD.org)
nroff typo fix
(based on a report from horikawa@jp.FreeBSD.org)

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame